Film-developing box.



C. W. GREENE.

FILM DEVELOPING BOX. APPLlCATlON FILED JUNE 9. 1915.

Pate tea July 4, 1916.

Wifnca-ACA UNITED STATES PATENT OFFICE.

CHESTER W. GREENE, OF EAST LYNN, MASSACHUSETTS, ASSIGNOB TO COMMON-WEALTH ENGINEERING COMPANY, INC.,'

OF LYNN, MASSACHUSETTS.

Essex and'State of Massachusetts, have invented; certain .new and usefulImprovements in Film-Developing Boxes, of which suitable material, "ligthe following is a specification.

The present invention appertains to an improved film develoging box tobe used 1n the development of p otographic films, and the primary objectof the invention is the provision of a device of this character by meansof which the film may be developed While within the-box, withoutrecourse to a dark room while a further object of the 1nvention is theprovision of simp1e,but effective means for locking and successivelyunlocking or releasing a series of drums upon which the film is woundpreparatory to developing.

The invention consists in certain novel combinations and arrangements ofparts as will hereinafter more specifically be set forth.

In the accompanying drawings I have illustrated a complete device ofthis character wherein the improvements of the present invention areembodied, and th1s device is constructed according to the best mode Ihave so far devised for the pracinvention. c

Figure 1 is a vertical central sectional view of the developing box,with the parts in the position they occupy when a film has been woundupon the revoluble drums. Fig. 2 is a sectional view of the film holderon line 22 Fig. 1, looking to the left, the upper portion of the coverbeing also illustrated to show its locking tongue. Fig.3 is a bottomplan view of the film holder. Fi 4 is a top plan view of the filmholder.

he two parts, the cup 1 and the cover 2, are preferably cylindrical inform and of a size to telescope with eachother, the open end of thecover 2 fitting in the open end of the cup 1.- These arts are composedof tin weight and dutical application of the principles of mySpecification of Letters Patent.

'up with each other,

Patented July 4, 1916.

Application filed June 9, 1915. Serial No. 33,086.

rable, and they fit together with a water tight or liquid tight joint toprevent waste of the liquid developer to be used in the process ofdeveloping.

At its open end, the interior of the cover is screw threaded as at 3,and on the inside of its closed end a comparatively thin diametricallytending'therefrom a suitable distance and formed with inclined edges 5,5. This locking rib is ing, and releasing, a series of winding spools ordrums as 6, 7 8, 9, which form a part of the film holder and in theedges of their open ends these fOlll'dlllIDS are provided with duplicatenotches 6', 7', the notches in the individual drums being arrangeddiametrically opposite each other so that the rib 4 may engage the pairsof notches simultaneously. In Fig. 1 it will be noted that the notchesare of increasing depth from the outermost drum to the innermost one sothat these notches will receive the inclined edges 5 5 of the rib 4.

The revoluble drums6 7 8 9 are arranged concentrically and will turnfreely, independently of each other upon a central stud 10 which ispassed through perforations in the bottoms of the drums and is securedby a nut or washer 11. In addition to the notches in the revolubledrums, each of the drums is provided with a slot or opening as 6, 7, 89, extending from near the open end of the drum to near its closed end,and it will be noted that these slots maybe lined as in Fig. 1 so thatthe free end of a film may be passed successively through the drums fromdrum 6 outwardly. Inclosing'the four revoluble drums, is a fifth drum 12which is concentric with the revoluble drums, but is held rigid withrelation to these drums. A cleat 12 on the outer surface of the drum is.utilized to attech and secure the free end of the film to be woundthereon.

The drum 12' is fastened by suitable devices, as 13 (see Fig. 2) to abase plate 14.- which is a circular disk of a diameter to fit neatly buteasily within the open end designed for the purpose of liold- V of thecover 2 and pass freely over the screw threaded portion 3 of the coverand formed with notches 14 in its edge. Attached to the outer side ofthis base plate are a pair of-slidable tongues 15 and 16 that areprovided with handles 15' and 16' and also with curved edge portions15and 16. The slide plate or tongue 16 is slotted to fit around the stud10 and the head 17 of the stud holds the plates against detachment.

The wider plate 15'is slotted at 15" so that the narrower plate 16 mayslide bodily therein anda hump 16" on plate 16 forms a lock for theparts. Near their outer ends these slide plates are also slotted, atdiametrrically opposite po' ts, so that the retammi lugs 18' which areintegral with but struc up from the body of the plate 14 may be passedtherethrough and clamped to the slide plates. These lugs are passedthrough their respective slotsand then bent over the bottom face of theslide plates, to retaln the slide plates, but it will be noted that theslots are sufiiciently large to permit movement of the plates withrelation to the base plate and in this movement the slide plates areguided by the slots about the stud 10. The slide plates are formed withhandles 15' 16' by means of which they may be pulled together or pushedapart, to engage the shde plates with the screw-thread 3, or to-withdrawthe slide plates therefrom.

In use, the cup 1 is first filled with the developing liquid up to thedesired level and the cup laid aside in convenient s1- tion for use. Theslots of the four revo uble drums and the drum 12 are brought in lineand the exposed film is ped into the drum 6. The free end of t e filmonits s 001 is then passed successively "through t e slots 6" 7 8 9 12,and then wrapped once around-the drum 12 and the end suitably. attachedor fixed to the drum at 12". The cover 2 is now passed over the filmholder so that the rib 4v fits into the pairs of notchesin' the edges ofthe open ends of the revoluble drums. Now pull the two handles 15' and16' toward each other, holding them in one hand and the cover in theother hand; The two circular edges 15 and 16 of the slide plates arethus caused to engage the screw threads 3, and now the cover is turned,the film ho(l1der lbeing held1 by the twg handles ofthesli e ates,integras o' l he film having been the other hand.

wrapped about the drum 12 as described, the

8, 7, 6, until all the drums are wrapped with the film and the rib iswithdrawn from the drums. The film is now wrapped or wound its fulllength on the drum, and it merely remains to submerge the film holderwith its cover'in the cup of the developing fore cup 1 is placed overdrums, developer or liquid in cup is placed into drums which are heldinto an inverted position and developer or liquid is oured from cup 1into drums through note as 14. Then cup 1 is pressed down over drumsinto position shown on drawing. This joint allows the air to escape butstill keeps the liquid from leaking out.

Notches 14' are so arranged that tbs)" .will allow a li uid to be pouredinto outsi e chamber and om this chamber the liquid will work its wayinto the fihn on drums. Box can then be turned end for end at intervalsuntil proper time has expired for developing film.- Then cup is-to belifted upward-from drums and developing solution or liquid poured backinto cup 1. After developer is poured out of drums a washing and afixing bath can be poured into drums before removing What I claim is:--r

'1. The combination with a cover having locking means, of a film holdercomprising a series of independently revoluble drums, each fashioned tooperatively engage with said locking means, and means causing thesuccessive disengagement of said drums.

2. The combination in a fihn developin box of a film holder comprising aseries 0 individually revoluble drums and a relatively non-revolubledrum, a cover for the holder, means on the cover for positively re,-volving the drums and means co-acting with the non-revoluble drums forsuccessively releasin the individually revoluble drums.

3. e combination in a film develo ing box with a fihn holder comprisinga use plate and a drum rigid therewith, a series of individuallyrevoluble drums within the outer drum, a cover for the holder havingmeans for engaging the revoluble d and means carried by said base platefor causing the successive releasing of said revoluble drums.

4. The combination with a cover having alocking rib of a film holdercomprising a series of independently revoluble drum Ill each formed witha recess engaged by said rib, and means for causing the successivewithdrawal of said rib from the drums.

5. The combination with a cover having a locking rib, of. a film holdercomprising a series of independently revoluble drums each formed with arecess engaged by said rib, a base plate and a drum fixed thereoninclosing the revoluble drums, a screw thread on the cover, and slideplates carried 10 by the base plate engaging said screw thread.

In testimony whereof I aifix my signature.

CHESTER- W. GREENE.

